Normal
In That TEDx talk, the admiral was saying something like sea level rises over the last 200,000 years being an inch. In the last 200 years, it's a foot. Don't quote me on the exact figures but it's definitely not stable "like before".I heard somewhere that the average, i.e. "normal", extinction rate is about 1 specie per 100 years. Natural selection and maybe aboriginal abuses.AUstralian Aborigines have been on this continent for how long now? 50,000 years? So if we take that 1 specie going extinct per 100 years as being "normal" cycle of evolution... that's 500 species since the arrival and it'd still be normal.
In That TEDx talk, the admiral was saying something like sea level rises over the last 200,000 years being an inch. In the last 200 years, it's a foot. Don't quote me on the exact figures but it's definitely not stable "like before".
I heard somewhere that the average, i.e. "normal", extinction rate is about 1 specie per 100 years. Natural selection and maybe aboriginal abuses.
AUstralian Aborigines have been on this continent for how long now? 50,000 years? So if we take that 1 specie going extinct per 100 years as being "normal" cycle of evolution... that's 500 species since the arrival and it'd still be normal.
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